a condition in which a material (such as the
rubber used to form a shaft
seal) is full of numerous tiny bubbles (see Figure
167). The presence of these bubbles is a
manufacturing defect due to air entrapment that,
if present, should be spotted and corrected by
at the flex
section can compromise the primary
lip’s ability to flex properly in response
Porosity on a secondary
lip can limit the lip’s ability to exclude
dust and dirt properly.
49 for a diagram of these seal components.
MANUFACTURING DEFECTS MAIN PAGE